Public bug reported:
The --incremental call (as also done by udev rules) refuses to (re)add a
temporarily disconnected members back to an already restarted (active)
raid array.
# mdadm --incremental /dev/sdb1
mdadm: not adding /dev/sdb1 to active array (without --run) /dev/md/0
# mdadm --incremental --run /dev/sdb1
mdadm: failed to add /dev/sdb1 to /dev/md/0: Invalid argument.
Even though this refusal may in the future only happen for true
conflicts (Bug #1088532), there is still an option missing to --force
the addition anyway.
Using --force with --incremental (where mdadm will still apply sanity
checks to not add it to a completely wrong array etc.) seems much less
dangerous than forcing the user to have to --zero-superblock around in
the system.
** Affects: mdadm (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
+ The --incremental (udev) call refuses to (re)add a temporarily
+ disconnected members back to an already restarted (active) raid.
- The --incremental (udev) call refuses to (re)add a temporarily disconnected
members back to an already restarted (active) raid.
+ # mdadm --incremental /dev/sdb1
+ mdadm: not adding /dev/sdb1 to active array (without --run) /dev/md/0
- Even though the refusal may in the future only happen for obvious
+ # mdadm --incremental --run /dev/sdb1
+ mdadm: failed to add /dev/sdb1 to /dev/md/0: Invalid argument.
+
+ Even though this refusal may in the future only happen for true
conflicts (Bug #1088532), there is still an option missing to --force
the addition anyway.
Using --force with --incremental (where mdadm will still apply sanity
checks to not add it to a completely wrong array etc.) seems much less
dangerous than forcing the user to have to --zero-superblock around in
the system.
** Description changed:
- The --incremental (udev) call refuses to (re)add a temporarily
- disconnected members back to an already restarted (active) raid.
+ The --incremental call (as also done by udev rules) refuses to (re)add a
+ temporarily disconnected members back to an already restarted (active)
+ raid array.
# mdadm --incremental /dev/sdb1
mdadm: not adding /dev/sdb1 to active array (without --run) /dev/md/0
# mdadm --incremental --run /dev/sdb1
mdadm: failed to add /dev/sdb1 to /dev/md/0: Invalid argument.
Even though this refusal may in the future only happen for true
conflicts (Bug #1088532), there is still an option missing to --force
the addition anyway.
Using --force with --incremental (where mdadm will still apply sanity
checks to not add it to a completely wrong array etc.) seems much less
dangerous than forcing the user to have to --zero-superblock around in
the system.
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https://bugs.launchpad.net/bugs/1088884
Title:
no option to force --incremental (re)add to active array
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